Family members had no contact with Grant since Friday, but did not report him missing to police.

Hohn said that while Grant parked his car on Highland Avenue near Grove Street, he backed up into a snowbank on Highland Avenue and apparently went to sleep with the engine running. The exhaust pipe was blocked by the snow, which allowed exhaust into the car interior, Hohn said.

When police checked the car, they determined it had run out of gas and the battery was dead, Hohn said.

Hohn said the man had a habit of parking in the Highland Avenue area near downtown, so family members centered their search there.

At 2:22 p.m. Sunday, the victim was found by family in his car parked next to 21-40 Highland Avenue.